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Published online 2 April 2008 | Nature 452, 514-515 (2008) | doi:10.1038/452514b

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Easy ways to other Earths

Laser combs offer ground-based telescopes a chance to spot planetary homes from home.

A more precise way of calibrating the measurement of spectra should make it possible to identify Earth-sized planets around stars outside our Solar System using ground-based telescopes.

The technique, described on page 610.

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